Dynamic microstructural evolution of an Al-Zn-Mg-Cu alloy (7075) during continuous heating and the influence on the viscoelastic response

被引：26
作者：
Rojas, Jose I. [1 ,2 ]
Crespo, Daniel [2 ,3 ]
机构：
[1] Univ Politecn Cataluna, Dept Phys, Div Aerosp Engn, C Esteve Terradas 7, Castelldefels 08860, Spain
[2] Univ Politecn Cataluna, Ctr Res NanoEngn, C Esteve Terradas 7, Castelldefels 08860, Spain
[3] Univ Politecn Cataluna, Dept Phys, C Esteve Terradas 7, Castelldefels 08860, Spain
来源：
MATERIALS CHARACTERIZATION | 2017年 / 134卷
基金：
澳大利亚研究理事会;
关键词：
Aluminum alloys; Microanalysis; Aging; Internal friction; Phase transformation; TRANSMISSION ELECTRON-MICROSCOPY; ALUMINUM-ALLOYS; ATOM-PROBE; PRECIPITATION; PHASE; TRANSFORMATIONS; TEMPERATURE; KINETICS; ZONES;
D O I：
10.1016/j.matchar.2017.11.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural evolution of an Al-Zn-Mg-Cu alloy under continuous heating over the temperature range of 298 to 648 K (25 to 375 degrees C) is characterized by focused ion beam-scanning electron microscopy, transmission electron microscopy, and atom probe tomography. The chemical composition, dimensions, number density, and volume fraction of precipitates are measured comprehensively. Quantitative measurements of Guinier-Preston zones volume fraction and eta'/eta phase volume fraction are correlated to the viscoelastic response of the Al-Zn-Mg-Cu alloy with temperature in the studied range. This provides valuable evidence indicating that observed variations in the viscoelastic behavior of the Al-Zn-Mg-Cu alloy may be associated with phase transformations involving Guinier-Preston zones and phases eta' and eta.
引用
收藏
页码：319 / 328
页数：10
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